<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1, user-scalable=no">
    <meta http-equiv="X-UA-Compatible" content="ie=edge,chrome=1">
    <meta name="author" content="姜启航">
    <title></title>
    <style>
    .btn{
            width: 200px;
        height: 200px;
        background-color: red;
    }
    </style>
</head>
<body>
 <button class="btn" type="button">132</button> 
<!-- <div class="btn">
    123
</div> -->
<script src="./js/jquery.js">
    
</script>
</body>
</html>
<script>
    $('.btn').click(function(){
        console.log('123');
    })
</script>